40520757 has 8 divisors (see below), whose sum is σ = 54139680. Its totient is φ = 26957840.

The previous prime is 40520737. The next prime is 40520761. The reversal of 40520757 is 75702504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40520757 - 2⁶ = 40520693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40520717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12282 + ... + 15227.

It is an arithmetic number, because the mean of its divisors is an integer number (6767460).

Almost surely, 2^40520757 is an apocalyptic number.

It is an amenable number.

40520757 is a deficient number, since it is larger than the sum of its proper divisors (13618923).

40520757 is a wasteful number, since it uses less digits than its factorization.

40520757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28003.

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 40520757 is about 6365.5916457153. The cubic root of 40520757 is about 343.4729314707.

The spelling of 40520757 in words is "forty million, five hundred twenty thousand, seven hundred fifty-seven".